// The MIT License
// 
// Copyright (c) 2013 Gwendal Roué
// 
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
// 
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

#import "GRMustacheExpression_private.h"

/**
 * The GRMustacheScopedExpression extracts a key out of a value.
 *
 * @see GRMustacheExpression
 */
@interface GRMustacheScopedExpression : GRMustacheExpression {
@private
    GRMustacheExpression *_baseExpression;
    NSString *_scopeIdentifier;
}

/**
 * Returns a scoped expression, given an expression that returns a value, and
 * an identifier.
 *
 * For example, the Mustache tag `{{ person.name }}` contains a scoped
 * expression, whose baseExpression is a GRMustacheIdentifierExpression (for the
 * identifier `person`), and whose identifier is `name`.
 *
 * @param baseExpression   An expression.
 * @param scopeIdentifier  An identifier.
 *
 * @return A GRMustacheScopedExpression.
 */
+ (instancetype)expressionWithBaseExpression:(GRMustacheExpression *)baseExpression scopeIdentifier:(NSString *)scopeIdentifier GRMUSTACHE_API_INTERNAL;
@end
